Effect of Surfactant Treatment on the Magnetic Properties of Mn-Doped ZnO Bulk and Nanoparticles

被引：36

作者：

Jayakumar, O. D. ^{[1
]}

Sudakar, C. ^{[2
]}

Vinu, A. ^{[3
]}

Asthana, A. ^{[4
]}

Tyagi, A. K. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

[2] Wayne State Univ, Dept Phys & Astron, Detroit, MI 48201 USA

[3] Natl Inst Mat Sci, Int CtrMat Nanoarchitecton, World Premier Int Res Ctr Initiat Mat Nanoarchite, Tsukuba, Ibaraki 3050044, Japan

[4] Natl Inst Mat Sci, Adv Elect Microscopy Grp, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 12期

关键词：

ROOM-TEMPERATURE FERROMAGNETISM; THIN-FILMS; SINGLE-CRYSTALS; NANOCRYSTALS; SEMICONDUCTORS; GROWTH; OXIDES; TIO2;

D O I：

10.1021/jp809288s

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report the effect of surfactant treatment on the structural and magnetic properties of Mn-doped ZnO bulk (Zn0.978Mn0.022O) and Mn- and Li-codoped ZnO nanoparticles (Zn0.96Mn0.03Li0.01O) prepared by low-temperature reaction. X-ray diffraction and transmission electron microscopy analyses of these samples showed the formation of impurity-free crystals with wurtzite ZnO structure. XPS data revealed that Mn exists in the 2+ oxidation state. TEM and HRTEM studies of sodium bis-2-ethylhexyl sulfosuccinate (AOT)-treated Zn0.978Mn0.022O showed predominantly rodlike microstructures developing into platelets and sizes in the range of 50-500 nm, whereas the AOT-treated Zn0.96Mn0.03Li0.01O sample showed nearly spherical particles in the nanometer regime (20-30 nm). DC magnetization measurements as a function of field showed enhanced room temperature ferromagnetism for the surfactant-treated Zn0.978Mn0.022O and Zn0.96Mn0.03Li0.01O. We discuss the possible role of surfactant and Li ion on the magnetic properties of Mn-doped ZnO.

引用

页码：4814 / 4819

页数：6

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